Results 21 to 30 of about 1,149,348 (167)
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, EarlyView.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
LES与DNS粒子轨迹的Lyapunov指数的比较 [PDF]
, 2012 本文根据LES,DNS和滤波以后的DNS的各向均匀同性湍流场计算了粒子运动的6个Lyapunov指数,用以考察LES与DNS粒子轨迹的差别。当粒子的惯性较大时,(St>1)3种结果得到的Lyapunov指数相近。当粒子惯性较小时 ...
李栋 +4 more
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Dianci bileiqi, 2018 复合绝缘子状态评价指标数据变化具有时空特性。复合绝缘子评价指标权重值随时间变化且不同指标数据随时间变化程度不同,具有时间渐变性和时间敏感性的特点,而绝缘子所处空间环境差异影响专家对评价指标主观权重大小认知。依据复合绝缘子所处空间特点确定主观权重,克服复合绝缘子空间特性对权重的影响;以熵权法确定评价指标的客观权重,体现指标数据变化的时间渐变特性;以博弈模型组合主观权重和客观权重,以主观权重值弥补客观权重值无法体现时间敏感性的不足,兼顾复合绝缘子指标权重的时间和空间特性 ...
王勋, 张明瀚, 程宏波, 伦利
doaj
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study examines multilingual practices in research interviews, focusing on English lexical insertions in Chinese‐language research interviews with teachers of Chinese in Australian secondary schools, and treating these code‐switches as analytically meaningful rather than incidental.
Chengwen Yuan, Tianwei Zhang, Gary Bonar
wiley +1 more source
Shuitu Baochi Xuebao, 2018 为研究花岗岩崩岗土体水分特征曲线及其影响因素，以福建省安溪县崩岗崩壁土为对象，通过压力膜仪对土体进行脱湿试验，绘制出崩壁土体水分特征曲线，并进行曲线参数与影响因素的相关分析。结果表明：随崩壁土体垂直深度增加，崩岗土体塑性指数、黏粒含量、分形维数及磨圆度等均整体呈降低的趋势；水分特征曲线斜率随着深度的增加而增大，土壤持水能力减弱，残余含水率及VG模型参数a却随之减小，而参数n却随之增大；残余含水率、参数（a、n）均与容重和颗粒的磨圆度呈极显著相关；残余含水率可用容重和黏粒含量描述 ...
程子捷 +6 more
doaj
The Academic Literacy of International Postgraduate Students in Australia: A Cause for Concern?
International Journal of Applied Linguistics, EarlyView.ABSTRACT This article discusses the academic literacy challenges faced by international postgraduate students at a South Australian university and evaluates the effectiveness of existing institutional support mechanisms. Drawing on survey data, the study highlights significant difficulties in academic reading, writing, and spoken communication, with ...
Werner Botha +6 more
wiley +1 more source
, 2021 为探究东北虎（Panthera tigris altaica）的生长发育特征，为东北虎的人工饲养以及野生东北虎的保护提供科学参考，测定了东北虎体重、胸围、腰围、肩高、臀高、体长、颈围和前后掌垫宽9个体尺参数，并对亚成体与成体东北虎体重及体尺参数的差异性及体重与体尺参数间的线性关系进行分析。结果表明：成体雄虎体重、体长、肩高、前掌垫宽及后掌垫宽均显著大于亚成体；成体雌虎臀高、胸围及腰围显著小于亚成体雌虎。4—5岁的东北虎，除体长、前掌垫宽和后掌垫宽以外，其他体尺参数均下降，5岁以后逐渐增长 ...
樊雪飞 2 +9 more
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Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, EarlyView.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
wiley +1 more source
野生动物学报, 2022 小型哺乳动物的身体和脏器重是动物对环境适应的近似指标,可随环境条件的变化进行适应性调整。以珠海市城区环境中分布的臭鼩(Suncus murinus)为研究对象,2019年5月—2021年3月测定其身体大小及脏器指数的性别差异和季节动态,以深入理解其脏器对环境的生理适应机制。结果显示:(1)臭鼩身体大小的性二态特征明显,雄性明显大于雌性 ...
母华强 陈 艳
doaj
Designing Integrated Policies for the Twin Transition: Challenges and Tradeoffs
Policy Studies Journal, EarlyView.ABSTRACT Democratic governance faces the intertwined imperatives of managing the transformative risks and opportunities of digitalization, particularly stemming from artificial intelligence (AI), while achieving environmental sustainability within planetary boundaries.
Martino Maggetti
wiley +1 more source